Boundary Scattering in Ballistic Graphene

Satoru Masubuchi; Kazuyuki Iguchi; Takehiro Yamaguchi; Masahiro Onuki; Miho Arai; Kenji Watanabe; Takashi Taniguchi; Tomoki Machida

doi:10.1103/PhysRevLett.109.036601

Boundary Scattering in Ballistic Graphene

Mesoscale and Nanoscale Physics 2012-07-20 v1

Authors: Satoru Masubuchi , Kazuyuki Iguchi , Takehiro Yamaguchi , Masahiro Onuki , Miho Arai , Kenji Watanabe , Takashi Taniguchi , Tomoki Machida

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Abstract

We report magnetotransport measurements in ballistic graphene/hexagonal boron nitride mesoscopic wires where the charge carrier mean free path is comparable to wire width $W$ . Magnetoresistance curves show characteristic peak structures where the peak field scales with the ratio of cyclotron radius $R_\textrm{c}$ and wire width $W$ as $W/R_\textrm{c} = 0.9 \pm 0.1$ , due to diffusive boundary scattering. The obtained proportionality constant between $R_\textrm{c}$ and $W$ differs from that of a classical semiconductor 2D electron system where $W/R_\textrm{c} = 0.55$ .

Keywords

magnetoresistance

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@article{arxiv.1205.5150,
  title  = {Boundary Scattering in Ballistic Graphene},
  author = {Satoru Masubuchi and Kazuyuki Iguchi and Takehiro Yamaguchi and Masahiro Onuki and Miho Arai and Kenji Watanabe and Takashi Taniguchi and Tomoki Machida},
  journal= {arXiv preprint arXiv:1205.5150},
  year   = {2012}
}

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14 pages, 4 figures

Boundary Scattering in Ballistic Graphene

Abstract

Keywords

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